<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- card卡片区域 -->
    <el-card>
      <!-- 为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 1000px; height: 550px"></div>
    </el-card>
  </div>
</template>

<script>
import echarts from "./echarts.min.js";
import _ from 'lodash'
export default {
  data() {
    return {
         options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
    };
  },
  methods: {},
 async mounted() {
    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById("main"));

    // 指定图表的配置项和数据
    const {data:res}=await this.$http.get('reports/type/1');
    if(res.meta.status!==200){
        return this.$message.error('获取折线图数据失败');
    }
    // 合并准备数据源和配置项
    const result=_.merge(res.data,this.options);
    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(result);
  
  },
};
</script>

<style lang="less" scoped></style>
